/*
 * Copyright 2000-2016 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.intellij.util.concurrency;

import org.jetbrains.annotations.NotNull;

import javax.swing.*;
import java.util.List;
import java.util.concurrent.AbstractExecutorService;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

/**
 * ExecutorService implementation which delegates tasks for execution to the SwingUtilities.invokeLater(task)
 */
public class EdtExecutorService extends AbstractExecutorService {
    @NotNull
    public static ExecutorService getInstance() {
        return INSTANCE;
    }

    @NotNull
    public static ScheduledExecutorService getScheduledExecutorInstance() {
        return SCHEDULED_INSTANCE;
    }

    @Override
    public void execute(@NotNull Runnable command) {
        SwingUtilities.invokeLater(command);
    }

    @Override
    public void shutdown() {
        AppScheduledExecutorService.error();
    }

    @NotNull
    @Override
    public List<Runnable> shutdownNow() {
        return AppScheduledExecutorService.error();
    }

    @Override
    public boolean isShutdown() {
        return false;
    }

    @Override
    public boolean isTerminated() {
        return false;
    }

    @Override
    public boolean awaitTermination(long timeout, @NotNull TimeUnit unit) throws InterruptedException {
        AppScheduledExecutorService.error();
        return false;
    }

    private static final ExecutorService INSTANCE = new EdtExecutorService();
    private static final ScheduledExecutorService SCHEDULED_INSTANCE = new SchedulingWrapper(INSTANCE, ((AppScheduledExecutorService) AppExecutorUtil.getAppScheduledExecutorService()).delayQueue) {
        @NotNull
        @Override
        public List<Runnable> shutdownNow() {
            return AppScheduledExecutorService.error();
        }

        @Override
        public void shutdown() {
            AppScheduledExecutorService.error();
        }

        @Override
        public boolean awaitTermination(long timeout, @NotNull TimeUnit unit) throws InterruptedException {
            AppScheduledExecutorService.error();
            return false;
        }
    };
}
